Table 3 SARS-CoV-2 RNA detected in school wastewater and the occurrence of confirmed COVID-19 cases in the following week.
From: Performance and suitability of wastewater based-surveillance for SARS-CoV-2 RNA in public schools
Confirmed cases and a positive WBS-signal | Confirmed cases and a negative WBS-signal | Risk ratio | P-value | |
|---|---|---|---|---|
1–2 days | 6/13 (46%) | 15/51 (29%) | 1.57 (0.76–3.24) | 0.205 |
1–3 days | 9/13 (69%) | 15/51 (29%) | 2.35 (1.34–4.12) | 0.011 |
1–4 days | 9/13 (69%) | 16/51 (31%) | 2.21 (1.28–3.80) | 0.015 |
1–5 days | 10/13 (77%) | 18/51 (36%) | 2.18 (1.35–3.51) | 0.008 |
